Alkalline-solution-developable liquid photographic composition

摘要

An alkaline-solution-developable liquid image-producing composition useful as a permanent protective layer for printed circuit boards is disclosed comprising at least: (1) an acrylic copolymer with hyroxy group, carboxyl group and branched unsaturated carbon double bond. Its number average molecular weight is 3,000 to 10,000 and its acid value is at least 30 mg KOH/g; (2) a photo reactive monomer with hydroxy group, the number of the unsaturated carbon double bond functional groups should be not less than 2; (3) a melamine compound; and (4) a free radical photo initiator.